Carbureter



H. M. CONNOR AND D. D, MILES.

CARBUHETER.

APPLICATION FILED JULY 23. 1917.

Patented u 19, 1919.

Donlljllileaj 6 UNITED STATES PATENT OFFICE.

HERSCHEL M. CONNOR AN D DON D. MILES, OF SAN FRANCISCO, CALIFORNIA,ASSIGNORS OF ONE-HALF TO ALBERT H. HERBERT, ON E-FOURTH TO MYRTLE C.MILES, AND ONE- FOURTH TO PANSY I. CONNOR, ALL OF SAN FRANCISCO,CALIFORNIA.

CARBURETER.

Application. filed July 23,

To all whom it may concern: 7

Be it known that-we, HEnscunL M. Coxxon and Don 1). MILES, both citizensof the United States, residing at San Franclsco, 1n the county of SanFrancisco and State of California, have invented certain new and usefulImprovements in Carburetors for Intcrnal-Con'ibustion Engines; and we dohereby declare the following to be a full, clear, and exact descriptionof the invent-um. such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to carburctcrs for internal combustion engines,but especially adapted for automobile engines, and has for its object toprovide for the more eilicicnt mi.\ing of the fuel and air; to provide a-means for the easy starting of the motor; to avoid the employment ofspring controlled valves, auxiliary air passages or moving parts otherthan the needle valve controlling the fuellevel; and to provide amultiplicity of fuel jets by which the charge of fuel is split up ordivided into several parts that will facilitate the atomizing action.

'ith these and other objects in view the invention consists in the noveldetails of construction and combinations of parts more fully hereinafterdisclosed and par- I ticularly pointed out in the claims.

Referring to the accompanying drawings forming a part of thisspecification in which like numerals designate like, parts in all theviews Figure 1 is a sectional view of a'carbureter made in accordancewiththis invention;

Fig. 2 is a side elevational view partly in section of the parts shownin Fig. 1;

Fig. 3 is a sectional view taken on the line 33 of Fig. 1 looking in thedirection of the arrows.

1 indicates the upper portion of the outer shell of the carlmretcr, 2the lower portion of said shell, joined as at 3 to the upper portion 1,and provided with the hot air tube or passage 4: leading from theexhaust manifold in order that air drawn in by the carburetor will bepreheated. 5 indicates a choke or butterfly valve controlling thepassage 4 and the admission of air intothe chamber 6. Located inside thecarburetor body portions 1 and 2 is the interior shell 7 provided withthe helically disposed flanges or members 8 v Specification of LettersPatent.

Patented-Aug. 19, 1919. 1917. Serial No. 182.342.

and to the lower end of said member 7 is screw threaded the member 9,provided with the flange 10 against which fits the lower portion 2 ofthe carbureter proper as shown. Said member 9 is provided with theextension or member 11 surrounded by the meniher 12. provided with thecoupling 13-lead ing from which is the fuel connection 14.

Said member 12 is locked to said member 11 float :21. A valve 25controls the port 20Uand,

is provided with a stem or extension 26.- to' which is secured thegrooved member 27 adapted to be actuated by the ends 28 of thecontrolling weights 29 pivotedas at 30 tothe,

bracket or support 31 carried by the slceve' 32, mounted on the support33as shown. l

The lower end of the inner member or casing 7 is provided with aplurality of ports or passages connectin the fuel space a 23 with theannular chain 1' or main fuel supply 36, and .37 represents a portconnecting said annular chamber 36 with a second annular chamberorauxiliary fuel supply 38 M open to the atmosphere by means of the curvedpipe 39. Passing through the upper wall 4-1 of the annular chamber 38are the nozzles 40 and 41 having respectively the fuel passages 42 and43. The nozzle 40 is shorter than the nozzle 41 for a. purpose that willappear below. Passin throughthe said upper wall 44 of the annu archamber 38 as well as through the upper wall 45 of the annular chamber36 are the fuel nozzles 47 and 48 provided respectively with the boresor passages 49 and 50. 51 and 52 represent respectively a pair ofadditional fuel nozzlesin all respects similar to the nozzles 47 and +8and which likewise pass down, through the said walls 44 and 45 into theannular main fuel supply chamber 36. It will be observed that boththenozzles 40 and 41 lead from the chamber 38 while the main nozzles 47.48. 51 and lead from the main fuel supply 3b.

It will be observed that the nozzles 40,

41, 47, 48, 51. and 52 are located in a circle and that theyextend'upwardly and into the annular passage 55 between theoutercarbureter wall 1 and the inner member 7, so that air which maybe-sucked through the passage 4 and from the chamber 6, will pass aroundsaid nozzles, and owing to a restriction in said passa e to be describedbelow, it will suck any uel which may be contained therein out of therespective bores, such as 42, 43, 49, 50, etc., so that said air willserve to finely subdivide or atomize the fuel found in said nozzles. Thehelically disposed members 8 carried by the inner cylindrical member 7form helical passages and it is preferred to so arrange the parts thatthere shall be a separate helical passage for each of the said nozzles.That is to say, the nozzle 47 for example, may open or'lead into apassage 56 while the nozzle 48 may lead into a companion helicallyarranged passage '57, etc.

It thus results that as the air drawn from the passage 4 circulatesaround the annular passage 55, in which the ends of said nozzles arelocated, the said air is separated or divided into parts, one of whichtraverses each of said helical passages such as 56 and 57, and thusthere are as many separate portions of the air as there are passages. Bythus dividing the air into separate divisions or parts the atomizationof the oil from each nozzle is greatly facili tated.

In order to more effectually suck the fuel out of the bores suchas 42,43, 49, 50, etc., of the nozzles I restrict the passage of the air fromthe annular chamber 55 into the respective helical passages such as 56and 57, by providing the solid portions at the bottom of the helixes,see Fig.2, and in order to cause the fuel to more perfectly mix with theair the surfaces of the said solid portions 70 are curved as isindicated "at 59. The curved surfaces thus provided have the effect ofcausing the air to swirl around in the passages 56, 57, etc., and thusto thoroughly mix with the fuel as said fuel and air is sucked alongsaid passages into the chamber 63 to be mentioned below.

0 represents a pipe or passage connecting thecham'ber 61" above thefloat 24 with the atmosphere. 62 .represents a throttle or other valvecontrolling'the passage of mixed fuel and air into the engine and 63represents the chamber or space into which the mixed fuel and air is.delivered from the helical passages.

The operation of-this device will be clear from the foregoing but may bebriefly summarized as follows:-

- There being a suction created .past the valve 62, preheated air willbe sucked in through the passage 4 Into the chamber 6 and into theannular chamber or passage 55 around the exits of the various nozzlessuch as 40, 41., 47, 48, 51, 52, etc. The fioat 24 having been soadjusted that oil will rise to a predetermined level, say slightly abovethe lower ends of said nozzles 40 and 41,

said air will suck fuel out of the nozzles sage, and will be drawn alongsaid 'passages while still rotating, so that by the time it reaches thechamber 63 it will be thoroughly atomized or mixed with said air. Thesaid oil or other fuel thus at first sucked from the said nozzles will acom paratively rich mixture, and therefore, will be suitable for theeasy starting of the motor. But, the curved pipe 39 iss'of'propor"tioned as toextend above thetlevel of the oil or other fuel maintainedin the, cham- 'ber 23, and therefore, air will soon enter the saidchamber38 and occupy the bore 42, of the nozzle 40, so that after theinitial suction or starting of the engine, the noz-- zle 40 will delivereither a very lean mixwithstanding the admission of'air into the chamber38 through the pipe 39. However, if the engine speeds up owing to therestricted character of the port 37, and its inab'iiity to supply agreater quantity of oil-than will feed one nozzle suchas 41, the mixedfuel and air that leaves the nozzle 41 will be always a lean mixturewhile the engine is running. In the meantime, the air drawn through thepassage 4'and from thechamber 6 into and through the annular chamber 55will continue to suck fuel from the main feed nozzles such as 47, 48, 51and 52, and thus supply theengine. The ports 35 are made of su cientdimensions to keep the annular' or main feed chamber 36 well suppliedwith fuel, and therefore, the nozzlessuch as 47, 48, 51 and 52 arealways furnished with sufficient oil for the running of the engine.

result that hot air from the chamber 6 freely circulates around saidfuel chambers thus effectually preheating the fuel sucked from saidnozzles, aml thereby greatly facilitatlng the atomization of said fueland its sub' sequent mixture with said air.

It will thus be seen that as the engine speeds up, fuel will cease topass through the bore 12 of the nozzle 10 and a very small quantity offuel will pass through the bore 43 of the nozzle fll, but larger andlarger quantities of fuel will pass through the main feed nozzles suchas 17 48, 51 and 52. In other words, the auxiliary feed chamber 38 beingopen to the atmosphere, an increase in suction will have no effect uponthe amount of fuel passing through the nozzle 41. An increase in suctionon the other hand, will cause greater and greater quantities of fuel topass through the main feed nozzles. Stated in other language, it willthus be seen that thi carbureter employs no spring ,controlled valvesand other-accessories that are liable to get out of order, while itprovides a means of furnishing a rich mixture for starting the engine,it furnishes a means of supplying a constant quantity of mixed fuel andair at low speeds through the nozzle 41 which is independent of thesuction, and it furnishes a supply for said main feed nozzles 17,48, 51and 52, which supply varying quantities of fuel according to the speedof the engine.

So perfect is the atomization of the fuel that this carbureter is notonly adapted for the ordinary gasolene fuels but it is also adapted forthe heavier distillates such as kerosene. It will be observed that theparts may be readily assembled and disassembled, for repairs, cleaning,etc., in that it is only necessary to remove the locking bolt or screwthreaded member 12 whereupon the fuel supply is readily taken off; andupon unscrewing the member 9, the lower port 2 of the carbureter readilyseparates from'the upper port 1, and the port 7 may be readily withdrawnfrom said port 1.

As the float 24 ascends it contacts with the Weights 29 whichservethrough their ends 28 to depress the needle valve 25 and thus cut offthe supply of fuel. 75 represents the usual throttle controlling leverand 7 6 the usual pivot or shaft for the butterfly valve 5.

It is obvious that those skilled in the art may vary the details of theconstruction as.

well as the arrangement of parts without departing from the spirit ofthe invention, and therefore, we do not wish to be limited to the abovedisclosure except as may be required by the claims. I -What we claimis 1. In a carbureter the combination of a fuel supply; automatic meansfor controlling the flow of fuel to said supply; an intake through whichair may be sucked; a plurality of nozzles located in the path of thesucked air; helically disposed means affording a plurality ofindependent paths for said air after leaving said nozzles; and

means to restrict said paths around said nozzles, substantially asdescribed.

2. In a carbureter the combination of a plurality of fuel supplynozzles; helically disposed means affording a passage of air around saidnozzles; means to restrict said passages around said nozzles, saidhelically disposed means adapted to cause-said air to assume a whirlingmotion after it passes said nozzles; and affording a plurality ofindependent passages for the mixed airand fuel as it leaves saidnozzles, substantially as described.

3. In a carbureter the combination of a plurality of fuel supplynozzles; means to provide a helically disposed passage for each nozzle;means to cause air to flo'w past said nozzles into said passages; andmeans associated with said passages to restrict said air to cause it toassume a whirling motion as it leaves said nozzles, substantially asdescribed.

4:. In a carbureter the combination of a main fuel supply; a pluralityof main'fuel feed nozzles fed from said supply; an auxiliary fuelsupply; means for admitting air feed nozzles fed from said supply; anaux-- iliary fuel supply; means admitting air to said auxiliary supply;a pair of feed nozzles communicating with said auxiliary supply aplurality of restricted helically disposed passages associated with saidnozzles;

. and means to conduct. air past said nozzles into said passages,substantially as described.

6. In a carbureter the combination, of a plurality of main feed nozzles;means to supply fuel to said nozzles; a plurality of auxiliary nozzles;means to supply fuel to said auxiliary nozzles; means to admit air tosaid last named means; a helically arranged passage for each nozzle;means to conduct air past said nozzles into said' passages; and meansassociated with said passages for imparting a whirling motion to themixed air and fuel as it enters said pas sages, substantially asdescribed. 1

7. In a carbureter the comb-nation of 'a plurality of main feed nozzles;means to supply fuel to said nozzles; a plurality of auxiliary nozzles;means to supply fuel to said auxiliary nozzles; means to admit air tosaid last named means; a helically arranged passage for each nozzle;means to conduct air past'said nozzles into said passages; means toautomatically regulate the amount of fuel entering the carbureter; andmeans associated with said passages comprising a curved surface forimparting a whirling motion to the mixed air and fuel as it enters saidpassages, substantially as described.

8. In a car'bureter the combination of a plurality of helically disposedopen ended passages; means comprising a curved surface to restrict thepassage of air and to impart a whirling motion to the same at one end ofeach passage; a feed nozzle associated with each passage near saidcurved surface;

and means to conduct air past each nozzle and through each passage,substantially as described.

In testimony whereof we aflix our signa- 15 tures in presence of twowitnesses.

HERSCHEL M. CONNOR. DON D. MILES.

Witnesses:

H. A. DOYLE, MARY L. THOMAS.

